Influence of Magnetic Property of Electrical Steel Sheets of Transformer on Eddy Current Loss

Abstract

　We analyzed a three-phase transformer made of laminated non-oriented electrical steel sheets using the 3-D parallel finite element method in order to numerically investigate the influence of the magnetic properties of the electrical steel sheets on the eddy current loss. The difference of the distribution of the magnetic flux and the eddy current between non-oriented and grain-oriented electrical steel sheets are numerically investigated. Moreover, the influence of the magnetic properties of the electrical steel sheets on the eddy current loss around the lap joint parts is clarified.